// Copyright (c) 2019, NVIDIA CORPORATION. All rights reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

#ifndef DALI_KERNELS_IMGPROC_WARP_WATER_H_
#define DALI_KERNELS_IMGPROC_WARP_WATER_H_


#include "dali/core/geom/vec.h"

namespace dali {
namespace kernels {

struct WaterMapping {
  vec2 amplitude = 1.0f;
  vec2 frequency = 1.0f;
  vec2 phase = 0.0f;

  DALI_HOST_DEV
  vec2 operator()(vec2 dst_pos) const {
    vec2 arg = frequency * shuffle<1, 0>(dst_pos) + phase;
    return dst_pos + amplitude * vec2{ sin(arg.x), cos(arg.y) };
  }
};

}  // namespace kernels
}  // namespace dali

#endif  // DALI_KERNELS_IMGPROC_WARP_WATER_H_
